The agency has reportedly convened a grand jury and subpoenaed Bolton's publisher, Simon & Schuster, for records related to communications surrounding the tell-all book, The Room Where It Happened.
A formal probe would mark a dramatic escalation over the book, which the White House sought to temporarily block from publication earlier this year, arguing it contained classified information. Bolton's book also painted the Trump administration in an unflattering light including details of infighting and the president's foreign policy.
The DOJ declined to comment when asked to confirm the investigation.
The Times reports that the investigation was opened after receiving a referral from Director of National Intelligence (DNI) John Ratcliffe. His signed declaration stated:
"The type of classified information in these passages is the type of information that foreign adversaries of the United States seek to obtain, at great cost, through covert intelligence.
"Unauthorized disclosure of these types of classified information could reveal, in some instances, the limits and, in some instances, the capabilities of U.S. intelligence collection and would cause irreparable damage to national security."













Comment: UPDATE, 15/9/2020: The judge criticized Bolton's decisions: Catch how slickly Bolton claims (and Blitzer agrees) 'Trump is just Putin's free chicken...': See also: